Thank you Cathal!

Apologies for the delay. With your help I managed to find my way.... 
I would like to develop a module similar in interface to the www.interactivewebs.com bulk emailer, not the functionality.

It opens a aspx page with its own menu... I have been struggling with that concept.
Do you have any ideas where I can start?

Thanks
Mike

The interactive webs module you are talking about is basically opening a aspx page that is all but completely disconnected from the dnn core - it performs all its own actions,menus,etc - entirely separate from dnn.

If you want your module to consume dnn services then you need to run inside the dnn module context - the moment you open an aspx page of any sort - you potentially loose access to a lot of dnn core functionality.

One way around this is to create your aspx page as a child of DotNetNuke.Framework.PageBase  instead of from the normal .Page code base - if your page is based on the dnn PageBase then you may have access to the dnn context.  But rest of things in terms of layout and the like you need to control directly in your page.

As for how to get the actual popup to work - the easiest way is to leverage jQuery = pretty much any of the more popular lightbox extensions for jQuery include options to handle the popup of an iframe.  You would need to use an iframe style lightbox popup so as to be able to open an .aspx page inside your existing page.

Westa